Reenforcing form for wall structures



J. W. BRAGSTAD REENFOR-CING FORM FOR WALL STRUCTURES Mar. 13,1923. 1,448,330

Filed May 10, 1920 2 sheets-sheet 1' Mar. 13,1923

J. w. BRAGSTAD v REENFORGTNG FORM FOR wAL'L STRUCTURES Filed May 10', 1920 2' sheets-sheet 2 5 if I Patented Mar. 13, 1923.

' JosnP w. BRAGSTAD, or OAK nAnK, ILLINOIS.

' B EN OB NG E03 1? O A L R CT B E Application filed May To all whom it may concern;v I

Be it known that I, Josnrrr W. Bnscs'ran, residing at Oak Park, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements; in Been-forcing Forms for lVall Structures, of which the following is a specification, reference being had to the accompanying drzm ings and the letters of referencemarked thereon, which form a part of this specification.

My invention relates to an expansihle metal form which is used inwall structures to reinforce and contain the interior wall.v

and receive the plastering.

It 18 therefore an object of my invent-10:1

to construct a metal device whichcan be shipped in unassembled or unenpandejd form and readily assembled or expanded when needed. I p

It is a further object of my invention to construct a form to which the plastering will readily adhere and be supported thereon. I 1 i It is also an object of my invention to construct'the same economically and involving the least amountof labor, "and in such a way that one may readily be placed upon another and interlocked therewith.

Other objects and advantages reside in the novel structure or means whereby I attain these objects, as will be apparent from the disclosures in the specifications and drawings. In the drawings Fig. 1 is a top plan view of a metal form involving my invention.

Fig.2 is a section thereof on the line 2-2 of Fig. 1, showing the unexpanded form.

-Fig.-;3 is a section similar to Fig. 2 but showing 'thesection in expanded form, 1

Fig. 4 is a section showing an interlocking connection used in my device.

Fig. 5 is a section showing how two forms are interlocked when one is placed. upon the other.

Fig.6 is a section on line 6-6 of Fig. 5.

' Fig.7 is apers'pective' view near the end of a "form showing a reen for'cing post and the 'manner of securingthe same.

'Fig. 8, is afsection -o-n the line 8-8 of. 4 ig. '9zis' a section through a wall embodying my invention showing the reen'forcing posts in; perspective.

i'g. v10is-a section showing an applica.

tures are preferably formed by cutting slits;

1920. ,Serial i 23,50,062.

tion of my invention in building construction. i

Fig. 11 shows an application ofmy inven tion to a retaining wall.

As shown on the drawings: y r

In practising my invention, I preferably cut and stamp a plurality of sheet metal plates with interfitting parts, whereby a pair of plates 1 maybe interlocked to constitute a collapsed iorm ,asfshown in Figs. land 2,

and whereby a second form be inter I in the metal'i and. bending the metalnou t wardly opposite sides thereof to for "fla n Part 4 and the. tangen s having lugs .6; which are preferably. formed in cuttingthe metal and: bent at right angles tothe flaring parts. These parts-4 and 3 yieldable and allow the tongue members to swing from inclined to'verticalpositii nv So these yieldable walled aperturesymay be termed hinge connections. will lee-noted that in the collapsed .form of the dev ce, these apertures are obliquely arranged and the tongues 2 are inclined or obliquely arranged. In assembling jthese plates ltoconstitute; the: collapsed forms, thetongnes 20f of the other plate, the lugs 7 on the tongues n lo king w th the leg 6 Q t e f a i g parts In theassembled collapsed form,

one plate is somewhatpin advance of [the other as shown i -F g. 2.

It. is contemplated that these collapsed forms shouldbe shipped to the place where they are to be used] But before using them,

they are expanded as shown in -Fi g. 3,;

.95 each plate are inserted in they apertures 3 hereby the tongues yield .or bend at their I bases and assume iposi-tiens which are substantialjly at right-angles to. the {plates and the interlocking parts yield and. as ume the Position sho -11 in F g A, whieh: the;

variable spaced relation. The ends 8 of the tongues 2 are narrower in width than the main parts of the tongues which are located between the plates; consequently, a pair of shoulders are formed on each tongue, one

. shoulder on each edge thereof, in a plane through approximately the point 9 in Fig. 4:. The proportion of parts are such that the shouldered parts of the tongues are slightly wider than the apertures 3, precluding the tongues thereby from slipping through the apertures. Each of the tongues'2 has preferably a corrugation 10 for the purpose of giving it strength and rigidity.

In constructing a wall with these forms it is desirable that a form which is placed upon another form be interlocked therewith. For this purpose I have constructed each plate with a pair of slits 11 and bent to a slight degree outwardly the metal adjacent thereto to form lips 12 as shown in Figs. 1

and 5. These slits 11 are located near the upper edge of the plates 1; the opposite edge of each plate having tongues 13 formed by cutting away the metal adjacent thereto, each tongue 13 having a lug or spur 14E stamped therefrom. And when one form is placed upon another form, the tongues 13 of the upper form are directed into the slits 11 of the lower form, the tongues 13 will pass through the slits 11 until the lugs 14 pass be hind the lips 12 at which point the two forms become interlocked.

' As the outer surface of each plate will receive the plastering, it is necessary that the plates be constructed that the plaster will adhere thereto and it is also desirable to have a guide to indicate the thickness of the rough plaster. longitudinal shelves or guides 15 from each plate, the shelves or guides being bent outwardly at substantially right angles to the plates. They also support the plaster, and the slots 17 which are caused by the stamping out of these shelves, may be filled with concrete and afford rough surfaces to permit the plaster to adhere thereto. If desirable lugs 16 may also be struck from the plates to assist in holding the plaster. These shelves 15 and lugs 16 extend outwardly approximately the entire thickness of the rough plaster wall, and thus they form the guide as to the thickness of the plaster wall." I

- It is contemplated that these forms when expanded may be used in the construction of I preferably cut and stamp any walls or floors, and in Figs. 9, 10 and 1.1 I have illustrated a few uses thereof. These forms are made so that when expanded the width thereof will correspond to the width of the desired wall. The interior of these forms are filled with concrete or a similar cementing substance to form the wall proper. Longitudinal reenforceing rods 19 may be used as shown in said figures, the forms being added one on top of the other and inter locked therewith as the occasion requires. F ig. 9 shows a construction of such a wall. in which vertical reenforcing rods 18am secured by means of wires 19 to'the outer sides of the plates near the ends thereof and beyond the shelves or guides15. These wires may bind the posts to both plates, as shown in Figure 3. These rods 18 are designed to be embedded in the rough plaster on'the plates, and the rough plaster receives the proper finished facing.

In Fig. 10 I have shown a ceiling 20 and a floor 21 thereabove which is supported by a wall embodying my invention, and in the right hand end of said figure I have shown a ceiling 22, which may be supported between a pair of walls embodying my iIXVGIk tion.

In Fig. 11. I have shown how my invention may be employed in making a broad retaining wall. As shown, a pair of walls such as shown in Figure 9 are constructed a distance apart with spacing and reenforcing rods 23 spanning the entire width thereof, after which the space between the walls may be filled with concrete or the like, and a well alin'ed and finished wall may be thus produced. While three vertical rows" of rods 19 are shown in Fig. 11, onlythe outer row thereof is necessary. I

It will accordingly be seen that I have devised a metal frame which may be assembled and shipped in a collapsed form and which. may be readily expanded when it is desired to use the same, which may be interlocked with another, and which has plastering faces and guides for indicating the thickness of the rough plaster. I

I am aware that numerous details of construction maybe varied through! a wide range without departing from the principles of this invention, and I thereforeLLdo-not propose limiting the patent granted otherwise than necessitated by the prior art.

I claim as my invention p 1. An eXpansible form for "a wall comprising a pair of spaced, plates, each plate having obliquely extending tongues and flaring walled apertures, the ends of said tongues being provided with integral lugs. stamped therefrom, and the lugs of the tongues of one platebeing interlocked with the flaring walls of the apertures of the other plate. h

'2. An expansible form for a wall com said tongues into perpendicular relation with said plates.

3. An 'expansible form for a wall comprising a pair of spaced overlapping mem bers, one of said members having obliquely extending tongues and the other member having apertures with flaring parts in which the ends of said tongues are interlocked,

said form being adapted to be expanded whereby said tongues are brought into substantial perpendicular relation with said plates.

a. An expansible form for a Wall comprising a pair of spaced overlapping plates. one of said plates having yieldably inclined extending members and the other plate having means interlocked with said members to produce a collapsed form adapted to be expanded.

5. A form for a wall comprising a pair of spaced overlapping plates, one of said plates having apertures and the other of said plates having oblique yieldable tongues interlocked in said apertures and yieldable from an oblique position to a perpendicular position for expanding said form.

v with.

6. An expansible formfor a wall comprising a pair of spaced plates, one of said plates having .yieldable tongues and the other plate having yieldable parts inter-F locked with said tongues whereby-said plates I,

may be collapsed orexpanded.

'7. In a form for a wall,a plate member having flaring walled apertures adapted for receiving parts of another plate in parallel relation therewith, and marginal tongues having spurs struck therefrom pose described. 8. 111 a form I having flaring walled apertures; obliquely for thefpur '45 for a wall, a plate-member fextending tongues, and marginal slits for the purpose'described,

9. Ina form-for a wall, a pair of spaced plates, one of said plates havington'gue's provided with interlocldngparts and the other of said members being provided withflaring Walled apertures, interlocked with said parts,'both of said plates having marginal interlocking parts for engaging and securing another form in alinement there- In testimony I subscribed my namem the presence of-two subscrlbmg wltnesses.

Witnesses: EARL M. HARDINE, FRED EPAESL RJ whereof I have hereunto JOSEPH W; B AesT-AD. I 

